rollup.config.js

import svelte from "rollup-plugin-svelte";
import resolve from "@rollup/plugin-node-resolve";
import commonjs from "@rollup/plugin-commonjs";
import livereload from "rollup-plugin-livereload";
import {terser} from "rollup-plugin-terser";
// import builtins from 'rollup-plugin-node-builtins';
const smelte = require("smelte/rollup-plugin-smelte");

// import postcss from "rollup-plugin-postcss";

const production = !process.env.ROLLUP_WATCH;

const BUILD_PATH = "assets";

function serve() {
  let server;

  function toExit() {
    if (server) server.kill(0);
  }

  return {
    writeBundle() {
      if (server) return;
      server = require("child_process").spawn(
        "npm",
        ["run", "start", "--", "--dev"],
        {
          stdio: ["ignore", "inherit", "inherit"],
          shell: true,
        }
      );

      process.on("SIGTERM", toExit);
      process.on("exit", toExit);
    },
  };
}

export default {
  input: "src/main.js",
  output: {
    sourcemap: true,
    format: "iife",
    name: "app",
    // file: "public/build/bundle.js",
    // jso: don't included by default by sails in every page like js
    file: `${BUILD_PATH}/jso/bundle.js`,
  },

  plugins: [
    svelte({
      // enable run-time checks when not in production
      dev: !production,
      // we'll extract any component CSS out into
      // a separate file - better for performance
      css: (css) => {
        css.write(`${BUILD_PATH}/styles/bundle.css`);
      },
      emitCss: true,
    }),

    // If you have external dependencies installed from
    // npm, you'll most likely need these plugins. In// some cases you'll need additional configuration -
    // consult the documentation for details:
    // https://github.com/rollup/plugins/tree/master/packages/commonjs
    resolve({
      browser: true,
      dedupe: ["svelte"],
    }),
    commonjs({}),
    /*    postcss({
          extract: true,
          minimize: true,
          use: [
            [
              "sass",
              {
                includePaths: ["./theme", "./node_modules"],
              },
            ],
          ],
        }),*/
    smelte({
      purge: false, // with production fails https://github.com/matyunya/smelte/issues/115
      output: `${BUILD_PATH}/styles/global-smelte.css`, // it defaults to static/global.css which is probably what you expect in Sapper
      // postcss: [], // Your PostCSS plugins
      whitelist: [], // Array of classnames whitelisted from purging
      whitelistPatterns: [], // Same as above, but list of regexes
      tailwind: {
        colors: {
          primary: "#78b578",
          secondary: "#009688",
          error: "#f44336",
          success: "#4caf50",
          alert: "#ff9800",
          blue: "#2196f3",
          dark: "#212121"
        }, // Object of colors to generate a palette from, and then all the utility classes
        darkMode: false,
      },
      // Any other props will be applied on top of default Smelte tailwind.config.js
    }),
    // builtins(),
    // In dev mode, call `npm run start` once
    // the bundle has been generated
    !production && serve(),

    // Watch the `public` directory and refresh the
    // browser on changes when not in production
    !production && livereload(BUILD_PATH),

    // If we're building for production (npm run build
    // instead of npm run dev), minify
    production && terser(),
  ],
  watch: {
    clearScreen: false,
  },
};